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Nuclear & Plasma Sciences Society

Distinguished Lectures

Dr. Luis M. S. Redondo

Pulsed Power Advanced Applications Group, Lisbon Superior Engineering Institute (GIAAPP/ISEL)


Solid-State Pulse Power on the Move!

These are fantastic times for the pulsed power engineers and physicians. Our greatest advantage over our predecessors is the legacy of their work and the technological progress.

In fact, accumulating energy during a relatively long time and than releasing it very quickly thus increasing the instantaneous power, with the aim of enhancing the properties of a product or a technique, has never been so transportable.

The progress on power semiconductors, such as Isolated Gate Bipolar Transistors (IGBTs) and Metal Oxide Field Effect Transistors (MOSFETs), moved first by the needs in the railway traction systems in the nineties and by the renewable energy production systems in the last decade, has produced a new category of devices that can switch MW of power in less than a microsecond and at the same time being reliable, relatively small and cost effective.

If one adds to it the flexibility normally achieved with semiconductor based circuit, hence, assembling compact and portable pulsed power modulators, using solid-state technology, is now possible for a wide range of applications, such as biomedics, environment and industry. Instead of having to go to large laboratories, one can now pack a pulsed-power modulator in a car and go to where is more needed, bringing this technology close to people.

This lecture provides fundamental concepts on the generation of repetitive high-voltage pulses using state-of-the art power semiconductor technology. This includes the most common power semiconductors devices used in solid-state-based high-voltage modulators and the most widespread semiconductor-based HV pulse modulator topologies, such as the classic Marx generator and voltage multiplier circuits. Other aspects related to the type of load requirements several applications present to the high-voltage modulators are described. Finally, future trends on this technology are discussed


photo of Prof. Luis M. S. Redondo

Luis M. S. Redondo (Member of the IEEE since 2006 and the Nuclear and Plasma Science Society) was born in Lisbon, Portugal in 1968. He received the Bachelor degree in Power Systems and Diploma degree in Electrical Engineering from the Lisbon Superior Engineering Institute (ISEL), Portugal, in 1990 and 1992, respectively. The Master degree in Nuclear Physics from the Science Faculty of the Lisbon University (FCUL), Portugal in 1996, and the Doctor degree in Electrical and Computer Engineering (Pulsed Power Electronics) in 2004, from the Technical Superior Institute of the Technical Lisbon University (IST-UTL), Portugal.

He is currently Coordinator Professor at ISEL, teaching Power Electronics and Digital Systems, and Head of the Electric Engineering Department of ISEL. His current research interests include the development of new solid-state pulsed power systems for industrial applications, nuclear instrumentation and ion implantation. Prof. Redondo is a member of the Portuguese Engineering Society (OE) and Nuclear Physics Research Center from Lisbon University (CFNUL), where is the Scientific Coordinator of the Instrumentation and Hyperfine Interactions Group.

Since 2011 is a member of the Pulsed Power Science & Technology Standing Technical Committee of the Nuclear & Plasma Science Society of IEEE. More recently he is the co-founder of the EnergyPulse Systems Company, dedicated to the development of pulsed power modulators to environment, food, biomedical and industrial applications.

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